Marco Rocks are natural calcium carbonate and quarried near Key Largo, Florida. The company promises to be a reliable base rock source for marine and reef aquaria.

Each box is hand packed by a reef enthusiast to ensure you get a nice variety for your own tank. These reef safe rocks arrive to you pre-cycled to help speed the setup of new aquariums. They are porous, lightweight and have a large surface area.

In an average 50-pound box you'll get 3 to 4 football-sized rocks and an assortment of smaller pieces to round out the box for weight. Marco Rocks promises "no rubble" and, in fact, adds an extra 1-2 pounds for any rubble that may result through the shipping process.

You can look for these babies on our website November 20. To view pics of what you can expect, click here.

If you have questions about Marco Rocks or any aquarium product or livestock, don't hesitate to contact us or leave a comment.